[Easy to Install]Just plug the receiver into a socket, mount the doorbell transmitter on the wall or anywhere you want via double-sided tape or screws. [300m/1000ft Range]Operating range up to 1,000ft/300m in an open area when there are no obstructions.2 plug-in receivers included; will not interfere with other equipment in your home or those of your neighbors; ensures that you will never miss any visitors, even if you are several rooms away. [60 MELODIES & 5 VOLUME]doorbell chime features 60 unique chimes and ringtones and 5 level adjustable volume (Mute to 115 dB)with night light function.Setting different ringtones for different receivers can let you know which door the visitor is at. LED flashing lights with o alert indicators which is easy for people including the hearing impaired to notice. [IP55 Waterproof]IP55 dustproof and waterproof, withstand various harsh weather conditions, suitable for any home, townhouse, apartment, office, school, , hotel, etc. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. size:71.8x39.8x19.5mm Material:ABS colour:white Package Contents: 1 * Doorbell Button 2 * Receivers Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.